There are two different FJ60 split cases. The cutoff was mid (April or so?) 1985. The later ones have the spacer. From what I've read the difference is about 4". You can get a couple inches by flipping the main (bottom) leaf on your rear springs and redrilling the center pin hole on the rest of the leaves, but I'm not sure it will be enough. That moves the rear axle back some. It gives a little more rear D/S length than leaving it as-is, and a lot of people like the extra wheelbase for stability. You'd would still have to have your front D/S retubed longer with the longer t-case though.

I have already flipped the rear springs, and I am planning on custom driveshafts as I want to put in a Toybox and its SOA. The combination of the Toybox and this tranny (it has the spacer, its 5/85) are going to make the drivetrain kind of long and my rear DS rather steep.

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1976 FJ-40
2001 UZJ-100

"Do not go gentle into that good night,
rage, rage, against the dying of the light" - Dylan Thomas